mull5yAnShiragsheli mull5yAnShiragsheli 29-11-2016 Mathematics contestada Mary is converting 30 yards per hour into feet per hour. Which conversion factor should she use? 1. 60 min/ 1 hr 2. 1 hr / 60 min 3. 3 ft / 1 yd 4. 1 yd / 3 ft